Millstone paint-staff



I M. W. LEONHARDT. V MILLSTONE PAINT STAFF. No. 273,555. I Patented Mar.6 ,18 83.

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N4 PETERS. Phowmqg mr, Washington, 0.0.

UNITED STATES PATENT. OFFICE.

MARTIN w. LEONHARDT, or SEDALIA, MISSOURI.

M l LLSTONE PAINT- STAFF.

SPECIFICATION forming part of Letters Patent No. 273,555, dated March 6, 1883.

Application filed September 22,1882. (MIodeL) To all whom it may concern:

Be it known that I, M. W. LEONHARDT, of Sedalia, in the county of Pettis and State of Missouri, have invented certain new and useful Improvements in Stafl's for Truing Millstones; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in stafl's for truing millstones; and it consists in the combination of a'suitable support, which is placed in the eye of the stone, and which is provided with a pivot upon which the stalf turns, with the stafl' and the adjusting block or rest, which is attached to each end of the stafl' by means of a swiveled adjusting-screw, as will be more fully described hereinafter.

Figure 1 is a side elevation of myinvention. Fig.2 is a plan view of the same.

v A represents the rest or support which is to be placed in the eye of the stone, and which has the pivot B formed upon its center. The staff 0, having its under edge beveled away from its center toward each end, and having a hole in its center for the pivot to fit in, is placed upon the top of the support, as shown in Fig. 1, and can be turned freely around over the top of the-st0ne. The under side of this staff is beveled away at each end, as shown, so as to allow the operator to see freely under and around the blocks or cross-staffs in all directions. These cross-staffs D are cut away at their centers to about half their depth, and the statf'is also cut away where it fits over their? tops to a corresponding distance. Through each end of the pivoted stafi' is passed the swiveled adjusting-screw G, which passes down into the cross staff or block and serves to adjust the block vertically, and thus regulate the amount of bevel which is to be given to the stone. v

In using my invention the rest orsupport stone about aquarter of an inch. The two cross-stafi's are then forced downward by the set-screws until the staff rests evenly upon 'these two cross-staffs alone, instead of upon the pivot. The pivot then serves only to retain the staff in position. The under side of the stalT is covered with red paint from the center out toward one end, and then the crossstaff upon the end that has been painted is drawn upward by its screw until it is just flush with the bottom of the stafi", and the staff isresting upon the bosom of the stone. When the stafl' is moved around the paint upon its lower edge will mark all the inequalities upon the stone. After these inequalities have been cut away, the same end of the staff is again p tinted but in order to make this same end rest evenly upon the stone where it has been dressed away, it will be necessary to .t'orce the cross-stafl' downward at the other end, in order to make the staff, come in contact with the dressed portion.

MARTIN WILLIAM LEONHARDT.

Witnesses:

PETER KOHN, LEOPOLD E. FBIENAL. 

